Preformed rail filler



Oct. 15, 1929. A. C.IFISCHER 1,731,336

PREFORMED RAIL FILLER Filed June 30, 1927 l atented @ch 1%, i929 Ula lTfifi STATES i FFEQE ALBERT U, FISCHER, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE PHILIP CAREY MANU- FACTURING COMPANY, A. CORPORATION OF OHIO PREEORMED RAIL FILLER Application filed June 30,

10 sound of the car upon the rail and insulating the track from the adjacent paving material and taking up expansion and contraction between them.

My invention is concerned more with the substance out of which the strips are made than with their particular form.

One of the objects of my invention resides in providing a preformed rail filler comprising Waterproofing binder and web-like o strengthening material, consisting of elongated and fiat fibrous material, such as pieces of felt, paper, wood pulp, ribbon excelsior, flat weeds, grasses, reeds or vegetation which is strong and consists of elongated, fiat fibrous material.

A. rail filler formed of a homogeneous mixture of a waterproofing binder and any one of such web-like'members, or any combination of such web-like members, provides a most effective means for insulating the rail from the surrounding paving, concrete, cement or the like, and it also provides a rail filler having pronounced sound deadening characteristics. In addition the web-like strengthening elements provide an efficient flow rctarder for the compressible waterproofing binder, such as bituminous material, and in addition thereto also provides an efficient structural reinforcing medium,

while at the same time considerably augmenting the compressibility and expansibih ity of the bituminous material or other binder of the rail filler.

These and other objects of my invention 5 will be apparent from a perusal of the following specification when taken. in connection with the accompanying drawings, wherein,

Figures 1 to 6 inclusive illustrate various 591 designs of preformed strips, which may be 1927. Serial No. 202,579.

used singly or collectively in connection with a rail after the manner illustrated and claimed in an application filed by H. N. Herbst on January 6, 1926, Serial No. 79,543, v

It is understood that any of the blocks or preformed strips shown in the application aforesaid, or any other type of strip may be availed of, the present invention being concerned with the material of which the rail filler strips are composed.

The present invention includes certain matter withdrawn from the above entitled application.

I propose to form my improved rail filler of a mixture of Waterproofing material and web-like strengthening material, which may comprise ti ither singly or in combination any of the following; elongated, flat fibrous material, such as, pieces of felt, paper, wood pulp, -ribbon excelsior, flat weeds, grasses, reeds or Vegetation which is strong and consists of enlongated,flat fibrous material.

The waterproofing material is preferably bituminous material, and I prefer to use blown bituminous material as a binder, or the waterproofing material may be a composition of bituminous material, resin and adhesive rubber, or bituminous material and either resin or rubber.

The preformed rail filler may be formed by rolling, pressing, molding or-extruding it into shape.

In some cases I also add sufficient linear fibrous filler to add insulating and sound deadening value to the filling blocks, and also i to impart strengthening value to the strip, thus preventing rapid disintegration of the block due to the vibration of the rails.

In other instances I may add earthly materials to the mixture or mixtures described, and

these earthy materials may include limestone the roofing scrap to prevent adhesion, as is well known in the art.

The etficiency of the rail filler will be greatest with the largest amount of fibrous material, but as an insulator and sound deadener the rail filler, however, will require sufficient waterproofing binder to thoroughly protect the web strengthening material from decay and to form a homogeneous mixture suitable to resist pressure. I

The ingredients are suitably mixed with the waterproofing material or bituminous material, when the latter is in a liquid state, in a suitable power mixer, and then the mixture is extruded, molded, rolled or pressed into suitable form. The bituminous material should be in about seventy-five per cent proportion to about twenty-five per cent of the other materials.

It can be readily understood that the incorporation of the described material in the bituminous material will insulate any of the granite, concrete or brick paving around the rail, and the composition of the rail filler will take up the sound and prevent its transmission from the rail to the hard paving. In addition the web-like strengthening elements together with the other ingredients will provide overlapping, reinforcing webs of some length, which will prevent the rapid disintegration of the rail filler due to the vibration of the rails, and will also provide a suitable expansion joint material due to the compressible qualities of the bituminous material and the resiliency of the web-like strengthening elements and the other ingredients, which may or may not be added as hereinbefore stated.

I claim:

1. A preformed rail filler having insulating, sound deadening and expansion qualities, comprising a homogeneous mixture of waterproofing binder, rubber and fibrous strengthening material of linear, flat form.

2. A preformed 'rail filler having insulating, sound deadening and expansion qualities, comprising a waterproofing binder, rubber and fiat, web-like strengthening elements.

3. A preformed rail filler having insulating, sound deadening and expansion qualities, comprising a homogeneous mixture of waterproofing binder, rubber, web like strengthening material and earthy material.

4. A preformed rail filler having insulating, sound deadening and expansion qualities, comprising a homogeneous mixture of waterproofing binder, Web-like strengthening elements and roofing scrap.

5. A preformed rail filler having insulating, sound deadening and expansion qualities, comprising a homogeneous mixture of bituminous material, resin and adhesive rubher, and web-like strengthening material.

(l. A preformed rail filler having insulating, sound deadening and expansion qualities, comprising a homogeneous mixture of waterproofing binder, web-like strengthening elements and a filler containing earthy mate rial.

7. A preformed rail filler having insu- Signed at Chicago, Illinois, this 16th day of June, 1927.

ALBERT C. FISCHER. 

